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Two pole-vaulters just clear the bar at the same height. The first lands at a speed of 7.84 m/s, while the second lands at a speed of 8.32 m/s. The first vaulter clears the bar at a speed of 0.800 m/s. Ignore air resistance and friction and determine the speed at which the second vaulter clears the bar.
Two positive point charges q1 = 12C and q2 = 48C are a distance 0.25 m apart. Find all the points where the total electric field is zero
7400 J of input heat to perform a certain amount of work. Engine 2 has an efficiency of 0.33, How much input heat does the second engine require
A resonant circuit in a radio receiver is tuned to a certain station when the inductor has a value of 1.50 µH and the capacitor has a value of 2.20 pF. Find the frequency of the radio station
A 360 kg piano slides 2.5 m down a 28 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline
A piece of metal is released under water. The volume of the metal is 37.0 cm3 and its specific gravity is 4.7. What is its initial acceleration
Calculate the average kinetic energy and the average potential energy for the 2nd excited state of a harmonic oscilator. use expectation values to calculate a quantum mechanical average, show integrations.
The total impedance of an RC circuit with a resistance of 200 ? is 1060 ?. If the frequency of the applied voltage is 20.0 Hz, what is the value of the capacitance in this circuit
q1. a 4.20 kg model rocket is launched expelling 57.0 g of burned fuel from its exhaust at a speed of 675 ms. what is
In Mexico, a courageous diver runs horizontally off the edge of a sea side cliff 48.8 m above the sea (about six stories high). Calculate her speed and direction angle of her velocity as she hits the water(or rocks)
The length of a string is 456 cm. It is held ?xed at each end. The string vibrates in three sections; i.e., the string has three antinodes and string vibrates at 180 Hz.
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of the sound is 2.30 10-6 W/m2 at a distance of 110 m from the explosion. Find the distance from the source at which the int..
A brass plate measures 30.0 cm by 40.0 cm. The coefficient of linear thermal expansion is 19.0 10-6/°C. what is the increase in the area of the plate
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